@judif , you may want to go back and leave reviews for those past sitters. As you note, this is probably why they haven’t left feedback for you. As @Southernsitter suggests, after you have left a review you could then ask those sitters if they would leave feedback on the sit they did for you. Reviews are, in effect, the currency exchanged here. A review is the only thank-you a sitter expects. @Colin points out that In general, if sitters see that a HO tends not to leave reviews, they may not want to apply.
However, because these were a while back and you have since left and received so many lovely reviews, in addition to having adorable dogs, a comfortable home, lots of great pictures and a nice location, your sit is still very appealing. So sorry you were disappointed by an undependable sitter. I hope you find someone perfect, so you can enjoy your upcoming holiday. Please let us know if you have success.